Horses and stables / [Frederick Wellington John Fitzwygram].

  • Frederick Fitzwygram
Date:
1881
Catalogue details

Licence: Public Domain Mark

Credit: Horses and stables / [Frederick Wellington John Fitzwygram]. Source: Wellcome Collection.

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    o 3. Effect of breath on the air. The impurities of the blood are thus transferred to the air. Air, therefore, which has been much breathed in contains too little oxygen and too much carbonic acid gas, and is besides loaded with the organic impurities given off by the lungs and also by the skin. Hence it is obvious that the condition of the blood and the health of the animal depend very much on the purity of the air supplied to the lungs. 4. Composition of the air. Pure air consists of about four-fifths of nitrogen and one-fifth of oxygen with small proportions of carbonic acid gas, aqueous vapour, ammonia, ozone, and other constituents. For the pur- pose of purifying blood, oxygen is the chief useful part of air. Nitrogen adds largely to its volume and dilutes the oxygen, which would otherwise be much too active. Any excess of carbonic acid gas is unwholesome, and an addition of *5 per cent, is sufficient to render air irrespirable. 5. Circulation of the air. Nature undisturbed takes her own means, into which it is not necessary here to enter, of restoring the purity of the air, or in other words, of maintaining in their due proportion the proper constituents of the air. But in a closed room or stable there are no means by which she can carry on her restorative pro- cesses. Hence the need of ventilation. It is absolutely neces- sary to maintain or restore the proper constituents of the air, if we wish for health for ourselves or our horses. 6. Natural facilities for ventilation. Fortunately the peculiar properties, or rather the state of the gases which respectively constitute foul and pure air, afford great facilities for ventilation. Heat causes all matters to expand, some more and some less ; but gases under the influence of heat expand very rapidly, and to a very great degree ; and as they expand, they of course become lighter. As a general rule, foul air in a stable is also heated air. It is only necessary to breathe on the hand to feel that our breath
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